Pile wire



March 20, 1934. T,G.MCGIRR 1 1,951,736

PILE WIRE OriginalFiled May 31, 1930 /NVENTOR 7 /000RE 6 N 61m? B I I, v

J J/fmA/gy Patented Mar. 20, 1934 UNITED STATES PATENT @FFECE Application May 31, 1930, Serial No. 458,139 Renewed September 8, 1932 6 Claims.

My invention relates to pile wires used in looms adapted for cutting the loops of pile fabric. The invention consists of means for securely retaining a trapezium shaped cutting blade in a slot in the free end of the wire, without employment of projections of any kind whatsoever, either attached to or struck up from one or the other of the walls, and extending beyond the face thereof for holding the blade in position.

The object of my invention is to provide a new, yet simple, inexpensive and effective means for locking the nose of the cutting blade to the free end of the pile wire, and a novel, yet easy and effective means for holding the heel or" the cutting blade in place against movement.

Another object of my invention is to provide a pile wire adapted to have a trapezium blade or cutting edge inserted within the slot, that, once placed in position, will remain locked therein; one that will not become dislodged except at the will of the operator.

Still another object of my invention is to provide a pile wire that is adapted to operate in the usual manner and by the usual means as now employed, but possessing that novelty with respect to the forward end for applying a blade in locked position ready to sever the pile as it is drawn through the loops of the fabric.

Yet another object of my invention is the forming of the walls comprising the wire, with means when associated together form not only the base for the cutting blade, but having a portion bent over at an angle, such portion turned to the inside, while the heel look for the cutting blade is also so formed on the same side wall that it will hold the blade in place so that it cannot shift to enter or to remove the same from the slot provided for its reception.

A more particular object is to provide a pile wire, the forward or free end of which is adapted to embrace a trapezium cutting blade, the latter having angularends adapted to be adjusted into position in the shortest possible time. The simplicity, accuracy and quickness that the same may be done, all tend to save time and consequently tending to the advantage of the producer. The invention will be better understood from the following description taken in connection with the accompanying drawing, wherein is shown what is now considered the preferred form. While the drawing illustrates merely some examples of means for putting my invention into practice, its scope will be pointed out in the specification and in the appended claims.

Further objects and advantages will become apparent as the description of the invention is hereafter developed.

In the drawing, Fig. 1 is a side elevation of the forward end of a pile wire, with the outer face wall removed, showing the same made up of three members; Fig. 2 is a like View, showing the two side faces so struck up as to provide the necessary abutting projections for supporting and maintaining the cutting blade in place; Fig. 3 is a like view, showing the forward end formed of a single piece, stamped and folded U-shapecl upon the opposite side, the supporting projections, as well as the forward and heel locking, secured together; Figs. 4, 5 and 6 are, respectively, end views of the forms of the invention shown in Figs. 1, 2 and 3.

Pile wires are used in groups in interrelation with each other in the manufacture of cut pile fabric; the forward free end of each wire, as shown, is provided with an enlarged end known as the spoonlike end; it may or may not be so enlarged, but for illustrative purposes serves to bring out more prominently the advantages of the forward blade locking means. This means for locking the forward nose of the blade is such that once the blade is inserted under the lock, it is impossible for it to become loose or movable. Again, by reason of the shape of the blade, the greater the pressure on the cutting edge, the more firmly the same is held within its holder. Then again, the heel lock that retains the heel of the blade in locked position binds the two side walls together. The intermediate supporting member is slightly less than the thickness of the blade by which the blade is clamped on each side and locked at the ends, when the parts are all assembled and ground down to size; such free end is no greater in thickness than the body of the pile wire.

In the constructing of the free end of the pile wire, one member or wall will be longer than the other. It matters not whether it is bent U- shaped upon itself with inward projections to form the blade supports, or that such means he provided by a separate member being inserted, the other wall having the forward turned over member forming a lock, the bent part of which provides a novel and secure locking member which conforms with the forward angular end of the blade, while to the rear is provided a bent- Over member, which not only locks the two walls together, but which houses the heel of the blade in the slot and holds the same thereunder. It has been found advantageous in the construction of pile wires to make the heads separate and then secure them to the body, which, when finished, will, to all appearances, be as though it were constructed of the same piece of metal. As noted, there is no advantage of using the spoonlike end, as the wire may be made the same width throughout its length.

Referring particularly to Figs. 1 and 4, the side wall 11 is removed so as to show the particular arrangement of the supporting member 12, which is securely held in position between the walls 10 and 11. The wall 10 has a recess cut in its upper part, as shown at 13, to receive the bent-over heel locking member 14, that is carried on the wall 11, as is also the forward bent-over locking member 15. The wall 11 terminates at its upper end in the nose 15 and assumes the shape shown by dotted lines 16. When the three members are secured permanently together, it will be seen that there is an elongated slot 1'7, with an open space 18 between the blade supporting member 12 and the nose lock 15, so that any lint, dust or other particles may be readily blown out, so as to insure the cutting blade 19 having a perfect level seat within said slot. As noted, the front edge of the cutting blade 19 has an angle, which provides a nose 20 that will be held under the lock 15, with the body portion of the blade resting on the support 12, and with the heel of the blade under the locking member 14, the blade will be held in proper operating position against accidental detachment from the wire.

As shown, the member 12 is shown provided with three point contact for the cutting blade to rest upon, it having been found from experiments that it is quicker to remove any particle from its surfaces. Then again by reason of the forward end being open as at 18, the same may be more readily cleared should any particles adhere within the slot. For the same reason, the rear end is provided with an opening 21, under the heel lock.

The members 10, i1 and 12 are so secured together as to provide the smoothest lines for the loops of pile fabric to pass over, there being no projections of any kind or degree whatsoever from either side by which the loops may be damaged. The walls 10 and 11 are ground down, forming a smooth finger for the loops should by any accident a blade break, which it does, to the great damage of the goods manufactured. The pile wire made as shown is simple, inexpensive and efficient, with simple and effective means for supporting and holding the cutting blade 19 locked in position whereby it will perform the greatest amount of work, and at the same time adapted for making a change in the shortest possible time.

Various means have been employed for supporting the blade in the slot, in some cases by a straight separate piece, or of allowing the blade to rest in the crutch of the U-shaped walls, while various means have been employed for locking the cutting blade in place. But in each of these constructions may be found defects from the manufacturers standpoint of labor, time in replacing blades, and the loss of material where damage has occurred by heads having projecting blade locking means of various kinds. One, if not the greatest loss, is sustained by the manufacturer by the breaking of the cutting blade during the operation of the pile wire passing through the fabric loops, any projecting means that extend beyond the face of the pile wire, no matter how slight such projections may be, nor how protected the loops of the pile fabric are liable to catch and become damaged as the pile wire is drawn through.

Referring now to Figs. 2 and 5, it will be seen that the walls 10 and 11 are in design the same as in Figs. 1 and l, with the exception that the supporting members are struck up from the sides, leaving an open space below such members for the dust, lint or other particles to be blown through. It will be understood that when these two members are thus formed, they form a com pact mass and when properly finished are practically uniform throughout its length. All edges of the wire are rounded and beveled so as to allow the pile of fabric loops to ride over the wire without damage should the cutting blade not function.

Referring to Figs. 3 and 6, wherein is shown the forward free end of a pile wire stamped up of a single piece of sheet metal, each wall having their struck up supporting members, which, when folded upon itself, will provide a support 12 for the cutting blade, while the nose lock 15 and the heel lock 14 will provide locking members for holding the blade in position.

in the placing of the cutting blade into the pile wire 23, the heel part 22 is slid under the heel plate i i, and then the forward looking nose 20 describes an are from the heel member which permits the nose to pass the forward locking member 15. As has been noted, the blade slot 17 is of such width that it grips and holds the blade all along its sides, thus when. seated therein with its nose and heel under their respective locks, any pressure exerted on the cutting edge will cause the nose 20 to seat the blade on its supports, whereby causing the blade to function to its full capacity and at the same time it is securely locked in place.

It will be noted that there are no projecting parts at any point throughout its length, nor can any of the loops of fabric become damaged should an accident to the blade occur. The cutting blades are examined for flaws before they are inserted in the wire, and this fact avoids a great amount of damage.

Various means have been employed to provide a holder or pile wire with the maximum of effectiveness, but where they have projections of any kind whatsoever for gripping and holding the 7 cutting blade, they are defective as noted.

It will be noted with the arrangement of the parts as shown and described herein, that my trapezium shaped cutting blade is wholly held in place by reason of its two extreme points being held secure under their respective looks, at the front and heel of the blade, with a binding contact all along the sides. It is impossible to get the blade out of the slot, without first moving it rearwardly slightly, then raising the forward end free from the front locking member, after which the blade may be wholly removed or reinserted as may be desired. Once the cutting blade has been inserted, it will remain until it is removed by the operator. There is only one way to apply the cutting blade and a reversal of such movements for removing it for a renewal.

The holder or pile wire being formed as shown herein affords a simple, cheap way of assembling the parts forming the blade carrying and locking member of the free end of the wire, which, when serted or removed with the minimum of time and labor at the same time being assured that such blade is housed to perform the maximum of SBIV? ice with the least result of accident to the pile fabric. Therefore, my trapezium shaped blade is so formed to secure the greatest service, first, by its simple outline which is devoid of cut outs or other projections, secondly, by its simple yet permanent locking means within the holder or other means of support, and thirdly, by reason of the simple and effective manner the blade is inserted and removed from its holder.

While I have herein described the form of my invention as at present preferred and which I consider to represent the best embodiment thereof, yet I desire to have it understood that the various forms shown are only illustrative, and that the invention may be carried out in other ways than that shown and described. Any of the forms may be used or modified to advantage, and they are all intended to come within the scope of the claims.

What I claim as new and desire to secure by Letters Patent is:

1. A pile wire comprising a body portion having smooth side walls, a trapezium shaped blade receivable and supported between the side walls. one of said walls formed to provide a nose lock and a heel lock for retaining the blade in place. the other of said walls being formed to provide recesses adapted to receive said locks in substantially flush relationship with the top of the pile wire, whereby projections liable to engage and injure the pile fabric are avoided, and a member carried between the walls on which the blade rests.

2. A pile wire comprising a body portion formed with a long and a short side wall, said walls being spaced and parallel to receive and hold the trapezium shaped blade there between, a member carried between the walls for supporting the lower edge of the blade, and having a space for blowing lint from the pile wire, one of said walls formed with a nose lock adjacent one end, and a heel lock adjacent the other end under which the ends of the blade are adapted to be received to retain the blade in place.

3. A pile wire comprising a body portion formed with a long and a short wall, the short wall having bent-over portions forming a nose and a heel lock, a member between the walls, a trapezium shaped cutting blade supported and held between the walls on said member and receivable under the nose and heel locks to be retained in place, and means for cleaning the pile wire.

4. A one piece pile wire formed with a smooth body portion bent upon itself to provide spaced parallel walls, one of which is longer than the other, and said short wall having members bent therefrom forming a nose and a heel lock, the other of said walls having recesses in the top thereof, said bent members being received in said recesses in substantially flush relationship with the top of the pile wire, and a trapezium shaped blade receivable between and held by the walls and retained in place by the said walls and the nose and heel locks, said pile wire being open on its under side.

5. A one piece pile wire formed with a body portion bent upon itself to provide spaced parallel walls, instruck portions forming a filler between the walls with an open space below the same, a trapezium shaped blade held secure between the walls and resting on the instruck portions, and one of said walls bent to form a nose and a heel lock for retaining the blade in place, said locks being received in recesses in the other wall and being flush with the top of the pile wire.

6. In a pile wire construction, a body portion formed with spaced parallel walls, one of which has a plurality of recesses in the top thereof, a blade receivable and held between the walls, instruck portions forming a seat for the blade, with an open space below the same, and the other of the walls formed with bent portions adapted to register with said recesses to form a nose and a heel lock for retaining the blade in place, said bent portions being substantially flush with the top of the pile wire.

THEODORE G. MCGIRR. 

